遥感监测土壤湿度综述

摘要

遥感技术具有大面积同步观测，时效性、经济性强等特点，为大面积动态监测土壤湿度提供了可能。本文对近年来国内外遥感监测土壤湿度的理论、方法的发展和应用进行了回顾，重点介绍了目前已经比较成熟和广泛应用的基于可见光与热红外波段的植被指数方法以及在干旱、半干旱地区的应用，通过对比分析了各种遥感监测方法的优缺点，指出了土壤湿度遥感监测方法存在的不足，展望了土壤湿度遥感监测方法的发展趋势。%With the features of observing large area synchronously,temporally,and economically,remote sensing technology provides the possibility for dynamic monitoring soil moisture of large area.The development and application of the remote -sensing technology in monitoring soil moisture was reviewed,and the application of vegetation index method in arid regions which based on visible and thermal infrared bands was introduced in this paper.It also analyzed advantages and disadvantages of various remote -sensing methods in monitoring soil moisture,pointed out shortages of the remote -sensing methods,prospects of the technology of using remote - sensing to monitor soil moisture monitoring.